Update android application with expansion file on Play Store

Question

I have an existing application on PLAY STORE with 1.5 GBs of data hosted on and downloadable from an external server.
After installing the application I am asking the user to download the data and set the path for it in the application.

Now I want to integrate the Expansion file mechanism in this application.
My questions are:

1. Is it possible to update the application with the Expansion File mechanism in which New users are able to download the data through the expansion file and existing users (after updating apk from the Play Store) don't need to download the expansion file again and can continue with the old data?

2. This is the paid application which is using GOOGLE Licensing as well; so if the above is not possible and if it's needed to upload a new application with a different package name and unpublishing the current application, then how to maintain existing users' (old application) Licensing?

Thanks in Advance.

Answer 1

Neither is possible:

• Re 1: Google Play usually downloads the expansion file right along with the APK.

• Re 2: Apps can only verify their own license not the license of other apps using Google's License Verification Library.